Abstract

We report on an original method that measures sample thickness in a diamond anvil cell under high pressures. The method is based on two hypotheses: completely plastic deformation on the gasket and completely elastic deformation of the diamonds. This method can further eliminate the effect of diamonddeformation on the thickness measurement of a sample, which permits us to measure the thickness of alumina up to .

Received 13 February 2007Accepted 11 June 2007Published online 09 July 2007

Acknowledgments:

The authors would like to thank Jeff Aycock for helping with the English language. This work is supported by the National Natural Science Foundation of China (Grant Nos. 40473034, 40404007, 10574055, and 50532020) and the National Basic Research Program of China (Grant No. 2005CB724404).